Chemistry
(i) If 150 cc of gas A contains X molecules, how many molecules of gas B will be present in 75 cc of B?
The gases A and B are under the same conditions of temperature and pressure.
(ii) Name the law on which the above problem is based.
Stoichiometry
ICSE 2018
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Answer
(i) According to Avogadro’s law : equal volumes of all gases under similar conditions of temperature and pressure contain equal number of molecules.
Given,
150 cc of a gas A contains X molecules
Therefore, 150 cc of B will also contain X molecule.
Hence, 75 cc of B will contain X/2 molecules.
(ii) The problem is based on Avogadro's law.
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